Sight glass for refrigeration valve



FIG. 1 is a front, top perspective view of a sight glass forrefrigeration valve comprising a new, original and ornamental design;

FIG. 2 is a bottom view thereof;

FIG. 3 is a front view, with the rear, right-hand side and left-handside views being mirror images thereof; and,

FIG. 4 is a top view thereof.

CLAIM The ornamental design for a sight glass for refrigeration valve, substantially as shown. 